Engineered Hydrogel Particles for Hematology Analyzer Calibration
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Solution Overview
Problem
Existing hematology analyzers require costly and laborious procedures for calibration using purified red blood cells, which can introduce batch-to-batch variation and rely on endangered species, necessitating the need for synthetic compositions that mimic red blood cells' optical and electrical properties.
Innovation Solution
Development of engineered hydrogel particles with tunable optical and electrical properties, encapsulating hemoglobin or hemoglobin-like molecules, to mimic red blood cells, reticulocytes, and platelets, allowing for accurate calibration and measurement in hematology analyzers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If purified red blood cells are used for calibration, then measurement accuracy is improved, but cost and labor requirements increase significantly
Solution Approach 1:
The patent creates synthetic control particles that copy the essential optical and electrical properties of real red blood cells without using actual biological cells. These particles replicate the light scattering patterns and impedance characteristics needed for accurate hematology analyzer calibration, eliminating the need for expensive purified cell preparations while maintaining measurement accuracy
Solution Approach 2:
The patent systematically varies physical and chemical parameters of the control particles including size, refractive index, conductivity, and hemoglobin concentration to match the target properties of real red blood cells. By adjusting these parameters during synthesis, the particles can be tuned to provide accurate calibration standards across different measurement ranges and cell types
2Measurement precision
If purified red blood cells are used for calibration, then measurement accuracy is improved, but batch-to-batch variation increases
Solution Approach 1:
The patent employs precise control of synthesis parameters such as polymerization conditions, particle size distribution, and embedded material concentrations to produce control particles with highly reproducible properties. This systematic parameter control ensures that each batch of control particles matches the target red blood cell characteristics consistently, eliminating the biological variability inherent in purified cell preparations
Solution Approach 2:
By creating synthetic replicas rather than using biological cells, the patent eliminates the fundamental issue of biological batch-to-batch variation. The control particles are manufactured through controlled chemical processes that can be precisely replicated across batches, providing consistent calibration standards without the variability associated with biological sample collection and processing
3Measurement precision
If optics-based flow cytometry is used, then cell characterization is improved, but cost and complexity increase
Solution Approach 1:
The control particles are designed to replicate the optical scattering properties of real cells, allowing them to be characterized by standard impedance-based hematology analyzers without requiring complex optics-based flow cytometry instrumentation. This enables accurate calibration and quality control using simpler, more widely available equipment while maintaining measurement precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The engineered particles provide a cost-effective and consistent calibration method for hematology analyzers, reducing labor and material costs while maintaining accuracy in identifying and measuring red blood cells, reticulocytes, and platelets, thus improving diagnostic precision.
Implementation Method 1
engineered particles with tunable optical and electrical properties, encapsulating hemoglobin or hemoglobin-like molecules
Implementation Method 2
impedance between the electrodes changes as the cell passes therebetween and is proportional to cell volume
Data Source
AI summary
Provided herein are red blood cell control compositions comprising one or more populations of lysable hydrogel particles having an impedance that is substantially similar to the impedance of a human red blood cell of average diameter; and a population of hemoglobin molecules or a population of dye molecules that have substantially similar absorbance as hemoglobin; wherein (i) and/or (ii) are present in an amount that corresponds to a normal blood sample or disease state, or (i) and (ii) are present at a ratio that corresponds to a normal blood sample or disease state.